If you care about the reputation - theres a marginal difference, but not much and the MQ Law school is becoming increasingly underfunded. Its only a matter of time before the reputation if MQ is displaced all the problems with the law school, which we students are fighting to address.
Style of teaching: MQ is philosophical/UWS is practical - which do you prefer. MQ has lecture/tute format, UWS has seminars.
Law society - MQ has a fairly active law society, UWS used to have a fairly inactive one but I hear this is changing
Elective choice - look at the electives for both uni's.
Transport - which suits you better to get to?
Infrastructure - UWS has some nice new buildings, MQ LAW is in all the old buildings.
Teachers - UWS tends to prefer ones who have practiced/ MQ prefers those good at research (MQ does have practicing teachers and UWS academics do research this is just focusing on the primary focus when hiring)
If you have any specific questions ask away